Pick up the low-smoke halogen-free power cable
What is a low-smoke halogen-free power cable? As the name implies: low smoke, which reduces the generation of harmful objects during combustion; halogen is a toxic gas for the human body, and halogen-free means that there is no release of toxic gas, usually for cables in case of fire. Low-smoke and halogen-free power cables can also be called environmental protection cables. Most of the low-smoke and halogen-free cables are used in hospitals and places with strict environmental hygiene requirements.
The identification of low-smoke halogen-free power cables mainly lies in the identification of insulating materials
1 burning method
According to whether the material is easy to burn, judge whether it is a flame-retardant wire-ZRBV or a flame-retardant power cable-ZRYJV... (For more cable technology, please click here, a lot of dry goods are waiting for you) According to whether it burns, identify its flame color; Whether there is smoke or not and the amount of smoke to judge whether it is a low-smoke halogen-free power cable-WDZ-YJV If yes, identify the color of the smoke, such as: the smoke is clear smoke or smoke containing charcoal ash; whether there is sol dripping, If so, see whether the sol continues to burn; and what kind of odor is produced when burning.
Teflon:In case of fire, it softens and deforms, has a thin layer of Zouqu, a small amount of coke, slightly coke and smells, and is non-flammable.
PVC:Green flame mask, softening, white smoke and odor of hydrochloric acid, self-extinguishing plastic; placed in water and sinking.
PE:Blue mask, the burning area is melted and transparent, with glue dripping and candle smell; placed in water and floated up.
PP:Blue mask, the burning area is molten and transparent, with glue dripping and kerosene smell; placed in water and floated.
PU:Black smoke, dripping of melt glue, no scorch ash, smell of nitrogen oxides, flammability.
Nylon:Blue mask, melt, burnt hair smell, self-extinguishing.
Silicone class:Odorless, thick white smoke, white residual ash, self-extinguishing.
2 Low-smoke halogen-free power cable specific gravity method
Density comparison method, that is, based on the density of water, the plastic material is placed in water, if it sinks, the plastic density is higher than that of water, and if it floats, it is smaller than water. This method can be used with other methods
The above two, simple test flame retardant power cable, flame retardant wire, low smoke halogen free power cable, low smoke halogen free wire.
Low smoke halogen free wire and cable price
The price of low-smoke halogen-free wires and cables is about 10%--20% higher than that of ordinary cables. The main reasons are: First, the raw materials are more expensive than ordinary wires and cables; It takes about 30%-50% more time than normal wires and cables, and the efficiency is relatively low, resulting in increased costs.
